Rivet-feeding device for rivet-setting machines



Jul 20 192s. 1,593,374

- M. W. VJILKENS RIVET FEEDING DEVICE FOR RIVET SETTING MACHINES Filed April 23 1923 2 Sheets-Sheet 1 gvwewtoz Myra/7 [MW/Mm;

351 his lbtow July 20 1926.

M. w. WYLKINS RIVET FEEDING DEVICE FOR RIVET SETTING MACHINES 2 Sheets-Sheet Filed April 23 1923 Myron M/k/m 351 his abfovm-c Patented July 20, 1926.

UNITED STATES PATENT orricr;

MYRON W. WILKIITS, F GLOVEEfisVELLE, NEXT! COMPJKNY, 0F GLOVERSVILLE, NEW YGRK, A CORPORATION OF NEW YORK.

RIVETYEEEDIITG DEVICE FOR RIVET-SETTING- MACHINES.

Application filed April 23,1923. Serial No. 633,854.

The present invention has particular reference to improvements on an invention patented under date of April 20,1909, No. 918,624, granted to me for improvements in rivet setting machines to which patent cross reference is here made.

Among the principal objects which the present invention has in view are: to avoid the accumulation of dirt in the feeding channels by which the rivets are carried to their point of application; to guide the rivet head in its operation; to insure the feeding of the rivets serially-and with certainty; to provide adjustment for the rivet feeding device; and to extend the useful life of the machine, I

Drawings.

Figure 1 is a front elevation of. a machine of the character mentioned;

Figure 2 is a side view thereof;

Figure 3 is a detail view on enlarged scale, showing a framing member and a sweeper for the feed race of the machine;

Figure dis a side view thereof;

Figure is a detail view on enlarged scale of the dolly head employed in the present machine; 7

Figure 6 is a detail viewon enlarged scale, showing the front of a hammer race;

Figure 7 is a detail view showing one of the plates forming the hammer race, the side plate being shown;

Figure 8 is a side view of a switchback block employed in the present invention;

igure 9 is a. vertical section thereof;

Figure 10 is a detail view showing a section of the switchback block, the section be ing taken as on the line 1010 in Figure 8;

Figure 11 is a section taken as on the line lit-11 in Figure 8;

Figures 12 and Bare detail views on en- Iarged scale of the transfer boot for guiding the rivets the views being of the front and side respectively;

Figure 14; is a front view of the dolly Figure 15 is a side view of an extractor;

Figure .16 is a vertical section thereof;

Figure 17 is a cross section showing in' enlarged detail the feed race for the rivets; and

Figure 18 is a detail of a guide pulley emdolly 30.

ployed for adjusting the driving belt for the hopper used herein.

Descrp tion.

roux, assrcnon TO E. J. wILKms may be used for other operations, it is particularly designed, as shown in the drawings, to the usereferred to.

a With this end in view a supply of small rivets having the usual heads and short shanks are carried in a hopper 21. The hopper 21 delivers the rivets to a hollow rotary drum 22, the interior of which is divided by a series of pockets formed by the partitions 23. Extending through the hopper is a feed race for the rivets which in the present case is constructed from parallel plates 2d. The plates 24 are joined in service relation by bolts 25 which are encompassed by spacing thimbles 26. I The plates 24 are. held in close approximation to provide a runway for the shanks of the rivets, while the heads thereof rest onthe uper edge of the race. At the end of each, of the plates 24 is a finger 27 which serves to guide the successive rivets to a small boot 28 by which they are delivered to the hammer guide 29, wherein they are inverted to turn the shank upward for insertion through the threading The rivets are extracted from the race and the plates 24 thereof by a rocking ex tractor 3 As best seen in Figures 15 and 16 of the drawings the extractor 31 has fingers 32 which are, separated to leave a space 33 sufliciently large for the rivets to pass into when the space is presented in the line of the rivets.

When the rocker is moved across the path of the rivets the endmost rivet .is withdrawn from the column held between the plates 24 and is released to move over the fingers 27 to the boot 28. It is'obvious that this occurs each time the extractor is rocked. The operation of the extractor is controlled by a rocking shaft having the cranks 34 and 35, to'the latter of which a connecting rod 36 operatively connects the crank 35 and an eccentric 37 on a driven shaft 38. This arrangement provides for the single opera tion of the extractor 31 with each rotation of the shaft 38 and the delivery, in consequence, of a single rivet to the hammer guide 29.

Within the guide 29 is a hammer 39 which is reciprocated by means of a cam groove and a pin therein formed in the cam wheel 40. At the end of its full upward stroke the hannner 30 carries the rivet upwardly, past the small hardened steel switchback block 41, to meet the descending dolly 30.

The dolly 30 is hollow, as shown best n Figures 5 and 10, and is removably held in the head 42 by the screw clamps 43. The head 42 has a rear extension 44, the end of which moves in a slot formed in the guide plate 45. The plate 45 is stationary and supports the rivet race formed by the plates 24. The extension 44, being thus mounted in the guide plate 45, steadies the operation of the head 42 and secures the accuracy of the operation thereof.

The head 42 is mounted on the connecting rod 46, which operatively engages a cam wheel 47, as seen best in Figure 2 of the drawings.

The cams in the wheels 40 and 47 are oppositely disposed with the result that the movements of the hammer 39 and the dolly 30 are relatively reversed, so that as the dolly is drawn down to the outlet of the hammer guide 29 the hammer 39 is carried up to force the shank of the rivet through any materials which may intervene between the said dolly and the rivet, this being the completion of the operation of the machine, a number or rivets being thus driven through the metal and the leather surmounting the same with great rapidity.

When the rivets are delivered from the fingers 27 the hanging ends of the shanks are caught on the upper edge of the boot 28, with the result that the rivets pass into and through the boot 28 with the heads of the rivets turned down, and in this condition each successive rivet is delivered to the hammer guide 29 into the path of the hammer 39.

It has been explained that the rivets are delivered from the hopper 21 to the hollow drum 22 to be carried by the small pockets formed by the partitions 23, for delivery to the raceway formed by the plates 24. To this end the plates 24 have an extended pan 48, the sides of which are slanted so that the rivets falling therein are delivered between the plates 24. To avoid the accumulation of rivets on the upper edges of the plate 24 an oscillating arm 49 is provided at the lower end thereof with a wiping brush 50. The brush 50 is a flexible pad which rests lightly over the upper edge of the plates 24 with the result that as the same is rocked back and forth across the said plates any loose rivets are struck therefrom to be precipitated into the hopper 21 and the drum 22.

For rocking the arm 49 an arm 51 is provided, the arm 51 being adjustably held on a swivel 52, by means of a set screw 53. On the outer end of the arm 51 is a friction reducing roller 54, which is impinged upon in passing between the brackets 55, as best seen in Figures 1 and 2 of the drawings. A spring 56 is employed for rocking the member 49 to its normal position from which it is moved by the arm 51.

By employing the separable and removable block 41, as seen best in Figures 8 and 9 of the drawings, any wear at this point in the machine, where the result of wear is disastrous, is compensated and avoided. By the employment of the block 41 of the hammer guide 29, and the rear extension 44 and guide plate 45 for the head 42, a degree of accuracy heretofore unknown is secured.

In the operation of the machine, by the employment of the open channel raceway formed by the plates 24, there is avoided any clogging of the machine due to the acceumulation of dirt or other material. By curving the boot 28, as seen best in Figure 12 of of the drawings. the delivery of the rivets to the hammer guide is more accurate and dependable than in the former machine. thereby securing to the present machine the advantages set forth in the statement of objects above.

Claims.

1. In a rivet feeding device for a rivet setting machine, a magazine for rivets; a hottomless channeled delivery race for said rivets, said race having guide fingers: and a boot disposed in juxtaposed relation to said guide fingers for receiving the rivets therefrom, said boot being arranged to interfere with the shanks of said rivets for inverting the same when they are delivered from said fingers to said boot.

2. In a rivet feeding device for a rivet setting machine, a magazine for rivets. a delivery race for said rivets, a brushing member disposed in juxtaposed relation to the top of said delivery race, a bracket earried by said magazine, a pivotal connection between said bracket and brush. said brush being vertically adjustable relative to said bracket over said race, a post carried by said magazine, an operating lever pivotally supported in said post, means carried by said post for adjusting said lever longitudinally therein, a rotary hopper associated with said magazine, peripherally spaced members on said hopper for intermediate contact with the free end of said lever for rocking same on its pivot,.and an operati e connection between said lever and brush for oscillating said brush on its pivot upon rocking movement of said lever.

MYRON W. WILKINS. 

